DIN EN ISO 10938-2017 Ophthalmic optics - Chart displays for visual acuity measurement - Printed projected and electronic (ISO 10938 2016) German version EN ISO 10938 2016《眼科光学 视敏度.pdf
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1、February 2017 English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 11.040.70!%anw“2627584www.din.d
2、eDIN EN ISO 10938Ophthalmic optics Chart displays for visual acuity measurement Printed, projected and electronic (ISO 10938:2016);English version EN ISO 10938:2016,English translation of DIN EN ISO 10938:2017-02Augenoptik Anzeigetafeln fr die Sehprfung Gedruckt, projiziert und elektronisch (ISO 109
3、38:2016);Englische Fassung EN ISO 10938:2016,Englische bersetzung von DIN EN ISO 10938:2017-02Optique ophtalmique Dispositifs daffichage de tableaux doptotypes destins au mesurage de lacuit visuelle Tableaux doptotypes imprims, projets et affichs par des moyens lectroniques (ISO 10938:2016);Version
4、anglaise EN ISO 10938:2016,Traduction anglaise de DIN EN ISO 10938:2017-02SupersedesDIN EN ISO 10938:199807www.beuth.deDocument comprises 15 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.02.17 DIN EN ISO 10938:2017-02 2 A com
5、ma is used as the decimal marker. National foreword This document (EN ISO 10938:2016) has been prepared by Technical Committee ISO/TC 172 “Optics and photonics”, Subcommittee SC 7 “Ophthalmic optics and instruments” in collaboration with Technical Committee CEN/TC 170 “Ophthalmic optics” (both secre
6、tariats are held by DIN, Germany) with the active participation of German experts. The responsible German body involved in its preparation was DIN-Normenausschuss Feinmechanik und Optik (DIN Standards Committee Optics and Precision Mechanics), Working Committee NA 027-01-08 AA Augenoptik. The DIN St
7、andards corresponding to the International Standards referred to in this document are as follows: ISO 8596 DIN EN ISO 8596 ISO 15004-1 DIN EN ISO 15004-1 Amendments This standard differs from DIN EN ISO 10938:1998-07 as follows: a) the Scope has been extended to include electronic systems for the di
8、splay of optotypes; b) normative references have been updated; c) new terms have been included; d) requirements for optotypes have been revised; e) requirements for printed charts, projected displays and electronic screens have been specified. Previous editions DIN EN ISO 10938: 1998-07 DIN EN ISO 1
9、0938:2017-02 3 National Annex NA (informative) Bibliography DIN EN ISO 8596, Ophthalmic optics Visual acuity testing Standard optotype and its presentation DIN EN ISO 150041, Ophthalmic instruments Fundamental requirements and test methods Part 1: General requirements applicable to all ophthalmic in
10、struments DIN EN ISO 10938:2017-02 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10938 October 2016 ICS 11.040.70 Supersedes EN ISO 10938:1998English Version Ophthalmic optics - Chart displays for visual acuity measurement - Printed, projected and electr
11、onic(ISO 10938:2016) Optique ophtalmique - Dispositifs daffichage de tableaux doptotypes destins au mesurage de lacuit visuelle - Tableaux doptotypes imprims, projets et affichs par des moyens lectroniques(ISO 10938:2016) Augenoptik - Anzeigetafeln fr die Sehprfung - Gedruckt, projiziert und elektro
12、nisch(ISO 10938:2016) This European Standard was approved by CEN on 12 September 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists
13、 and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under t
14、he responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugo
15、slav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN
16、 DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 10938:2016 EEuropean foreword .3Introduction 51 Scope . 62 N
17、ormative references 63 Terms and definitions . 64 Requirements 74.1 Optotypes . 74.1.1 Size of optotypes 74.1.2 Luminance of background . 74.1.3 Contrast of optotypes 84.1.4 Quality of presentation . 84.1.5 Resolution 84.2 Requirements specific to optically projected displays . 84.2.1 Focus range .
18、84.2.2 Projector screens . 84.3 Requirements specific to printed charts . 84.4 Range of compliance 84.5 Conformity to ISO 15004-1 95 Test methods . 95.1 Type tests . 95.2 Conformity 95.3 Resolution . 96 Accompanying documents 97 Marking, labelling and packaging . 10Bibliography . 11Contents PageDIN
19、EN ISO 10938:2017-02 EN ISO 10938:2016 (E) 2Foreword .4European foreword This document (EN ISO 10938:2016) has been prepared by Technical Committee ISO/TC 172 “Optics and photonics” in collaboration with Technical Committee CEN/TC 170 “Ophthalmic optics” the secretariat of which is held by DIN. This
20、 European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2017, and conflicting national standards shall be withdrawn at the latest by April 2017. Attention is drawn to the possibility that some of the el
21、ements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 10938:1998. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the foll
22、owing countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
23、Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 10938:2016 has been approved by CEN as EN ISO 10938:2016 without any modification. DIN EN ISO 10938:2017-02 EN ISO 10938:2016 (E) 3 ForewordISO (the In
24、ternational Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee h
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